Child_process not writing binary file?

I am using the npm library child_process library in an electronic project to grab the stdout stream from a C program using spawn. However, when I try to log the output from 'printf' or 'fprintf' captured by child.stdout.on ('data'), nothing is displayed. This is my test code:

#include <stdio.h>
#include <string.h>

int main(){
    char buffer[256];
    int i = 0;
    while(1){
        snprintf(buffer, sizeof(buffer), "echo %d\n", i);
        printf("%s\n", buffer);
        fprintf(stdout, "%s\n", buffer);
        system(buffer);
        system("sleep 1");
        i++;
    }
    return 0;
}

      

        
        
        
      

    

I know my javascript is correct because the line fetched by the syscall is captured and I tested it with similar loops in ruby ​​script and bash script and they worked just fine.

When I run the binary in a terminal shell everything is output just fine, but when I try to write all three outputs (the first line should be "echo 0 \ n echo 0 \ n 0") with child.stdout.on ("data", (data) => {...}); the only thing I'll get back is, as I said, "0" from the system call. I am at a loss for a solution.

It might seem that when I run this program in the terminal, I cannot use ^ C to terminate it, as it is just picked up by stdin and transferred the screen with the exit.

Here is my javascript if needed:

const { spawn }= require('child_process');
let test;

// Invoked by a button that when clicked calls ipcRenderer.send('test');
ipcMain.on('test', (event, ...args) => {
  test = spawn('./a.out', []);
  test.stdout.on('data', (data) => {
    console.log(data);
  });
});